Section 10: Spraying Operations

Introduction

In the industrial setting, spraying of parts is accomplished with many processes, including conventional air spray, airless spray, powder coat, electrostatic, and atomization. Suitable mechanical exhaust ventilation to adequately remove flammable and combustible air contaminants for spraying operations must be established. Housekeeping and ventilation equipment maintenance programs are also necessary for spraying operations.

Guide

10.1.

All spraying areas must be provided with ventilation that adequately removes flammable vapors, mists, or powders and also provides adequate volumes of quality make-up air in enclosed areas. Spray booths using exhaust air filters must maintain an average air velocity of 100 feet per minute. Contaminated air should not be circulated or re-entrained into another makeup air unit intake.

Lights, switches, outlets, motors, etc. in spray areas must be suitable for the hazardous location; i.e., explosion-proof and properly located when installed.

10.4.

Sprinkler heads must be kept clean so as to operate within their designated parameters. Sprinkler heads which have become sprayed should be replaced; in such an instance, an evaluation should be undertaken to prevent re-occurrence.